package com.group.Filter;

import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
@WebFilter("/self.jsp")
public class SelfInfoFilter implements Filter {
    public SelfInfoFilter() {
    }
	public void destroy() {
	}
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		HttpSession session = ((HttpServletRequest)request).getSession();
		if(session.getAttribute("SESSION_USER") != null) {
			chain.doFilter(request, response);
		} else {
			request.setAttribute("tip", "您还未登录,请先登录!");
			request.getRequestDispatcher("ClassInfoServlet?action=info").forward(request, response);
		}
		
	}
	public void init(FilterConfig fConfig) throws ServletException {
	}

}
